甚麼是{浮沈理論} 多Ｄ知料

據我所知 你所講的浮沈理論是沒有的
阿基米德定律就聽過 阿基米德定律就話啦
如果一個浸在流體中的物體(全部或者係部分)受到向上的浮力
個果大小等於物體所排開流體的重力
公式系　F浮=G排出
如果你話係要浮沈呢 就講到話
當一件物體的密度=浸泡液體或氣體的質量時的狀態→浮。

當一件物體的密度大於浸泡液體或氣體的質量時的狀態→下沉。

{浮沈理論} is the Principle of Floatation.
The Principle states that the weight of a floating object equals to the weight of fluid displaced.
For example:
A ship of weight 10,000,000 N (mass 1,000,000 kg) floats on water in a river (assume the water is of density 1000 kg/m3), then the weight of water displaced by the ship, by the Principle of Floatation, is also 10,000,000 N.
From this, you can find out that the volume of water displaced = 1,000,000/1000 m3 = 1,000 m3
This 1000 m3 is just the volume of the ship submerged under water.